EXHIBIT 12



COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES



The ratio of earnings to fixed charges is calculated using the Securities and Exchange Commission guidelines.



|                                                              |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|------------------------------------------------------------- |  | ------------------------- | --- | ------------------------- | - | -------------------------------- |  | - | --- | ------------------------------ |  | ------------------------- | - | ------------------------- |  | - | --- |  | - | ---
|                                                              |  | Successor(a)              |     |                           |   | Predecessor(a)                  
|                                                              |  | YearEndedDecember 31,2008 |     | YearEndedDecember 31,2007 |   | Nine MonthsEndedDecember 31,2006 |  |   |     | Three MonthsEndedMarch 31,2006 |  | YearEndedDecember 31,2005 |   | YearEndedDecember 31,2004
|                                                              |  | (in millions)            
|Earnings as defined for fixed charges calculation             |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|Add:                                                          |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|Pretax income from continuing operations                      |  | $                         | 458 |                           | $ | 415                              |  | $ | 102 |                                |  |                           | $ | 186                       |  | $ | 412 |  | $ | 378
|Fixed charges                                                 |  |                           | 122 |                           |   | 139                              |  |   | 100 |                                |  |                           |   | 35                        |  |   | 114 |  |   | 106
|Deduct:                                                       |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|Interest capitalized(b)                                       |  |                           | 19  |                           |   | 30                               |  |   | 14  |                                |  |                           |   | 3                         |  |   | 7   |  |   | 5  
|                                                              |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|Total earnings (as defined for the Fixed Charges calculation) |  | $                         | 561 |                           | $ | 524                              |  | $ | 188 |                                |  |                           | $ | 218                       |  | $ | 519 |  | $ | 479
|                                                              |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|Fixed charges:                                                |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|Interest on debt, including capitalized portions              |  | $                         | 113 |                           | $ | 130                              |  | $ | 95  |                                |  |                           | $ | 33                        |  | $ | 105 |  | $ | 95 
|Estimate of interest within rental expense                    |  |                           | 9   |                           |   | 9                                |  |   | 5   |                                |  |                           |   | 2                         |  |   | 9   |  |   | 11 
|                                                              |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|Total fixed charges                                           |  | $                         | 122 |                           | $ | 139                              |  | $ | 100 |                                |  |                           | $ | 35                        |  | $ | 114 |  | $ | 106
|                                                              |  |                           |     |                           |   |                                  |  |   |     |                                |  |                           |   |                           |  |   |     |  |   |    
|Ratio of earnings to fixed charges                            |  |                           | 4.6 |                           |   | 3.8                              |  |   | 1.9 |                                |  |                           |   | 6.2                       |  |   | 4.6 |  |   | 4.5



|(a) | See Note 1 for additional information on Predecessor and Successor reporting.
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|(b) | Excludes equity costs related to AFUDC that are included in Other Income and Expenses in the Consolidated Statements of Operations.
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